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Method for preparing oxidized rosin

A technology for oxidizing rosin and rosin, applied in the direction of chemical modification of natural resin, can solve the problems of low catalytic efficiency and large amount of catalyst, and achieve the effects of high catalytic efficiency, high rosin conversion rate and good application prospect.

Inactive Publication Date: 2007-11-28
GUANGXI UNIV FOR NATITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to overcome the shortcomings of the existing technology, such as large amount of catalyst used, low catalytic efficiency, and the difficulty of coordinating the rosinamine Schiff base with metal ions such as manganese and cobalt to form a high-efficiency catalyst.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Weigh 0.1 mol of o-phenylenediamine and dissolve it in 200 mL of absolute ethanol, add 0.22 mol of salicylaldehyde, at this time, yellow crystals are precipitated, react at a constant temperature of 30-80°C for 0.5-2 hours, and a large number of crystals are formed. Cooling, filtering, washing and drying several times, the o-phenylenediamine Schiff base is obtained.

[0019] Weigh 0.05-0.1 mol of copper acetate solid, add an appropriate amount of absolute ethanol to dissolve it, add it to the product obtained from the above reaction, stir and react at a constant temperature of 40-80°C for 0.5-3h, a large number of crystals are formed, cool, filter with suction, wash, and dry. Copper o-phenylenediamine Schiff base was obtained.

[0020] Weigh 200g of rosin and dissolve it in 500mL of absolute ethanol, add 0.05%-0.5% of o-phenylenediamine Schiff base copper as a catalyst, start the magnetic stirrer to stir evenly, control the water bath at 40-80°C, add 5-15mL of 30% H 2...

Embodiment 2

[0023] Weigh 0.1mol of ethylenediamine and dissolve it in 200mL of absolute ethanol, add 0.22mol of p-hydroxybenzaldehyde, at this time, yellow crystals precipitate, stir and react at a constant temperature of 30-80°C for 0.5-2h, a large number of crystals are formed, cool, filter , After repeated washing and drying, ethylenediamine Schiff base was obtained.

[0024] Weigh 0.05-0.1mol of manganese acetate solid, add an appropriate amount of absolute ethanol to dissolve it, add it to the product obtained from the above reaction, stir and react at a constant temperature of 40-80°C for 0.5-3h, a large number of crystals are formed, cool, filter with suction, wash, and dry. Ethylenediamine Schiff base manganese obtained.

[0025] Weigh 200g of rosin and dissolve it in 500mL of absolute ethanol, add 0.05%-0.5% of ethylenediamine Schiff base manganese as a catalyst, start the magnetic stirrer to stir evenly, control the water bath at 40-80°C, add 5-15mL of 30 %H 2 o 2 , after rea...

Embodiment 3

[0028] Weigh 0.1 mol of aminoacetic acid and dissolve it in 200 mL of absolute ethanol, add 0.22 mol of borneol, at this time, yellow crystals are precipitated, stir and react at a constant temperature of 30-80°C for 0.5-2h, a large number of crystals are formed, cool, filter, and pass through Washed several times and dried to obtain Schiff's base of aminoacetic acid.

[0029] Weigh 0.05-0.1mol of zinc sulfate solid, add an appropriate amount of ethanol to dissolve it, add it to the product obtained from the above reaction, stir and react at a constant temperature of 40-80°C for 0.5-3h, a large number of crystals are formed, cool, filter with suction, wash, and dry. Zinc glycine Schiff base was obtained.

[0030] Weigh 200g of rosin and dissolve it in 500mL of absolute ethanol, add 0.05%-0.5% of zinc glycine as a catalyst, start the magnetic stirrer to stir evenly, control the water bath at 40-80°C, add 5-15mL of 30% H 2 o 2 , after reacting for 0.5-3 hours, take it out, fil...

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Abstract

The present invention is Schiff' s base-metal complex catalyzed rosin oxidizing process for preparing oxidized rosin. After it is dissolved in alcohol solvent, rosin is oxidized with H2O2 under the catalysis of Schiff' s base-metal complex so as to prepare oxidized rosin. The process has the advantages of low catalyst consumption, high catalysis efficiency, low catalysis cost, high rosin converting rate, simple product post-treatment, etc. and is suitable for industrial production. The oxidized rosin has softening point raised to about 98 deg.c, and may be applied widely in adhesive, paint, papermaking, ink, plastic, rubber, etc.

Description

technical field [0001] The invention relates to a preparation method of modified rosin, in particular to a preparation method of oxidized rosin. Background technique [0002] Rosin is a rich renewable resource, cheap, easy to get raw materials, natural non-toxic, environment-friendly, therefore, more and more fields encourage the use of rosin products. However, rosin itself has many defects, such as large crystallization tendency in solvents, easy oxidation, low softening point, and easy reaction with heavy metal salts in varnishes, etc., which limit its application in many industrial sectors. In order to eliminate these performance defects of rosin, it must be modified. The modified rosin overcomes the above defects to varying degrees and has a wider range of applications. There are many ways to modify rosin, among which esterification, saponification, disproportionation, hydrogenation and polymerization are widely studied and applied. The catalytic oxidation of rosin is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09F1/04
Inventor 刘祖广雷福厚钟磊
Owner GUANGXI UNIV FOR NATITIES
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